SCHEDULE 13G

GRAIL Inc

Common Stock, par value $0.001 per share · CUSIP: 384747101

Event date: 2025-12-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Baker Bros. Advisors LP

  Shares: 2,085,333.00 · Class: 5.3%

• Baker Bros. Advisors (GP) LLC

  Shares: 2,085,333.00 · Class: 5.3%

• Julian C. Baker

  Shares: 2,085,333.00 · Class: 5.3%

• Felix J. Baker

  Shares: 2,085,333.00 · Class: 5.3%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.